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EFM-001
12S–14S 100A UAV Battery Monitoring Board | Ayaa

Interfaces: CAN / UART / Isolated RS485

Protocol Support: Modbus RTU and project-specific UAV integration

DroneCAN integration available for compatible UAV systems

A smart battery monitoring board designed for 12S–14S UAV battery packs.
The EFM-001 provides real-time monitoring of individual cell voltage, total pack voltage, current, temperature and state of charge (SOC). It supports CAN, UART and isolated RS485 communication for battery-status reporting, parameter configuration and system diagnostics.

Cell & Total Voltage
Monitoring

Static voltage sampling accuracy of ≤10mV

Charge & Discharge Current Detection

Current sampling accuracy reaches ≤2%

Self-Discharge Storage Function

Self-discharge with adjustable discharge current up to 50mA

SOC

<5%

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EFM-001
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Product Introduction

The EFM-001 is a smart battery monitoring board designed for 12S–14S UAV battery packs.

It monitors individual cell voltage, total pack voltage, current,temperature and state of charge (SOC), providing real-time battery telemetry for professional UAV systems.

For system integration, the EFM-001 supports CAN, UART and isolated RS485 communication interfaces. Battery-status data can be transmitted to compatible UAV systems and PC-based tools for monitoring, parameter configuration and diagnostics.

The board also supports configurable alarm thresholds, self-discharge storage control and battery-heating control according to the selected hardware configuration.

Key Specifications

Swipe to see full parameters ↔
1 Series Configuration 12S–14S ​ 10 Temperature Sensors 3 channels
2 Continuous Operating Current Up to 100A 11 Temperature Measurement Range -40°C~80°C
3 Sleep-Mode Current Consumption ≤350 μA 12 Temperature Measurement Accuracy ±2°C
4 Cell Voltage Range 0-5 V 13 Temp. Sensor Type NTC 10K
5 Cell Voltage Accuracy ±10 mV 14 SOC Estimation Error <5%
6 Total Voltage Range 12-70 V 15 Operating Temp. -20°C~65°C
7 Total Voltage Accuracy ≤ ±2% 16 Operating Humidity 5%-90% RH
8 Current Accuracy ≤ ±2% 17 Dimensions Available upon request
9 Weight Available upon request 18 Active-Mode Current Consumption ≤10 mA

Compatible Battery Models

Ayaa BMS compatible high-performance lithium and semi-solid-state UAV battery configurations.

Swipe left/right to view full compatibility matrix ↔
14S BMS - Verified Compatible Battery Packs
Semi-Solid 14S1P 51.8V 26000mAh UAV Battery Semi-Solid 14S1P 51.8V 45000mAh UAV Battery 14S1P 51.8V 31000mAh Smart Plug-in UAV Battery 14S1P 51.8V 12000mAh LiPo UAV Battery 25C 14S1P 51.8V 22000mAh LiPo UAV Battery 25C 14S1P 53.2V 16000mAh LiPo UAV Battery 25C 14S1P 53.2V 20000mAh LiPo UAV Battery 25C 14S1P 53.2V 22000mAh LiPo UAV Battery 25C 14S1P 53.2V 25000mAh LiPo UAV Battery 25C 14S1P 53.2V 30000mAh LiPo UAV Battery 25C 14S1P 53.2V 40000mAh LiPo UAV Battery 30C 14S1P 51.8V 16000mAh LiPo UAV Battery 25C 14S1P 53.2V 30000mAh Smart Plug-in High Discharge UAV Battery 14S1P 53.2V 21000mAh Agricultural Drone Battery 25C Smart Plug-in Pack High Voltage Semi-Solid 14S1P 55.3V 67000mAh UAV Battery 10C 14S1P 51.8V 30000mAh Semi-Solid UAV Battery High Energy Density High Voltage Semi-Solid 14S1P 53.9V 41000mAh UAV Battery Semi-Solid 14S1P 51.8V 35000mAh UAV Battery High Voltage Semi-Solid 14S1P 55.3V 24500mAh UAV Battery High Voltage Semi-Solid 14S1P 54.6V 28500mAh UAV Battery Semi-Solid 14S1P 51.8V 31000mAh UAV Battery 25C 14S1P 53.2V 22000mAh Smart Plug-in High Discharge UAV Battery

Monitoring and Integration Capabilities

Real-Time Battery Telemetry

Real-Time Battery Telemetry

Monitors individual cell voltage,total pack voltage,current,temperature and SOC for real-time UAV battery-status reporting.

Multi-Interface Communication

Multi-Interface Communication

Supports CAN, UART and isolated RS485 communication for UAV integration, configuration and diagnostics.

Configurable Alarm Thresholds

Configurable
Alarm Thresholds

Supports configurable voltage, current and temperature alarm thresholds for project-specific UAV battery monitoring requirements.

OEM / ODM Engineering Support

OEM / ODM
Engineering Support

Communication parameters, monitoring thresholds and auxiliary functions can be configured according to UAV system requirements.

Technical FAQ for EFM-001 Integration

Q:What communication interfaces and protocols does the EFM-001 support?
The EFM-001 supports CAN, UART and isolated RS485 communication interfaces.For PC-based configuration and diagnostics, the monitoring board supports Modbus RTU communication at a default baud rate of 19,200 bit/s.
Q:What data is displayed on the monitoring-board software dashboard?
The dashboard shows individual cell voltage, temperature readings,total pack voltage, SOC, remaining capacity, charge/discharge current and active alarm flags.
Q: How do I connect the BMS to a PC via UART?
Connect BMS UART port to PC via USB-to-TTL converter
Open host software → Communication Settings
Select COM port + set baud rate to 19200
Click Open Serial Port → confirm "Serial port opened successfully"
Q: How do I test the over-current alarm?
Adjust the over-current alarm threshold through the PC configuration tool,simulate the trigger condition and monitor the alarm flags, operating status and indicator light.
Q: How do I test voltage alarm functionality on the BMS?
Use the PC host software to adjust the voltage alarm and release thresholds (over-charge, over-discharge, or cell imbalance). Simulate the corresponding voltage condition, then observe the alarm flags, operating status, and indicator light to confirm the alarm logic is working correctly.
Q: How do I test the battery heating function on the BMS?
Configure the heating activation and deactivation temperature thresholds via the PC host software. Simulate both the turn-on and turn-off conditions to validate the heating control logic. Confirm correct operation by monitoring the alarm flags, working status, and indicator light in real time.
21+ Years

Industry Experience

200+

Clients Served

50+

Countries Covered

Serving 200+ clients across 50+ countries in UAV and energy industries.

CE Certified / RoHS Compliant / ISO Quality System

Configurable Monitoring and Alarm Thresholds

Default monitoring parameters and configurable alarm thresholds for EFM-001 UAV battery-pack integration.

Swipe to view full technical parameters ↔
No. Protection Parameter Default Alarm Value Default Release Value Configurable
1 Cell Over-Voltage Alarm 4250 mV​ 4200 mV
2 Cell Under-Voltage Alarm 2500 mV 3200 mV
3 Total Pack Over-Voltage Alarm 4250 × N mV 4200 × N mV
4 Total Pack Under-Voltage Alarm 3000 × N mV 3200 × N mV
5 Low Cell Voltage Warning 3000 mV 2700 mV
6 Cell Voltage Imbalance 100 mV 80 mV
7 Charge Over-Current Alarm 23 A Confirm with R&D
8 Discharge Over-Current Alarm 80 A Confirm with R&D
9 PCB Over-Temperature Alarm 70 °C 65°C
10 Charge-Temperature Alarm Range 0~45 °C 5~43°C
10 Discharge-Temperature Alarm Range -20~55 °C -15~50°C
11 Auto-Discharge >3800 mV @ 72 H —
12 SOC Accuracy 3% ~ 5% —
13 Power Consumption ≤10 mA / ≤350 μA —
Contact an Engineer Download PDF Specifications

Key Features

Engineered for reliability, safety, and high-performance UAV operations

Three-Channel Temperature Monitoring

Supports three NTC temperature-sensing channels for pack-level thermal monitoring and configurable alarm reporting.

Cell &
Pack Voltage Monitoring

Provides real-time monitoring of individual cell voltage and total pack voltage with cell-voltage measurement accuracy of ±10 mV.

Current &
SOC Monitoring

Monitors charge/discharge current and SOC to support real-time battery-status reporting for UAV systems.

Multi-Interface
Communication

Supports CAN, UART and isolated RS485 communication for UAV integration,configuration and diagnostics.

Bluetooth Connectivity
(Optional)

Optional BLE connectivity enables wireless battery-status monitoring and diagnostic access through the mobile app.

Optional Diagnostic &
Display Interfaces

USB Type-C, SOC display and LED indicator options are available according to the selected hardware configuration.

Applications

Powering a wide range of UAV and aerial system applications

Inspection & Surveying UAVs

Real-time battery telemetry for inspection, surveying and mapping missions.

Environmental Monitoring Drones

Reliable battery-status reporting for long-duration data-collection missions.

Industrial UAV Systems

Voltage, current, temperature and SOC monitoring for professional UAV platforms.

Emergency Response Drones

Real-time alarm reporting for time-sensitive UAV operations.

Autonomous Aerial Platforms

CAN, UART and isolated RS485 communication for intelligent UAV integration.

Custom UAV Battery Systems

Configurable monitoring thresholds and communication options for project-specific battery-pack integration.

CUSTOM UAV BMS SOLUTION

Need a Monitoring Board for Your UAV Battery Pack?

The EFM-001 provides real-time voltage, current, temperature and SOC monitoring for 12S–14S UAV battery packs. It supports CAN, UART and isolated RS485 communication, configurable alarm thresholds and optional diagnostic interfaces.
​

Send us your battery-pack requirements and our engineering team will recommend a suitable EFM-001 configuration.

  • 12S–14S Battery Packs
  • Up to 100A Operating Current
  • Cell-Voltage Accuracy: ±10 mV
  • CAN / UART / Isolated RS485
  • Configurable Alarm Thresholds

Request Technical Proposal

UAV Power Engineers respond within 12 hours

Free R&D Consultation / High-Voltage Support / Protocol Integration

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